Re: TR1 Special Math

[Ed Smith-Rowland <3dw4rd at verizon dot net>]

On 11/13/2015 10:32 AM, Jonathan Wakely wrote:
> On 25 October 2015 at 20:48, Jonathan Wakely <jwakely.gcc@gmail.com> wrote:
> > On 25 October 2015 at 17:46, Ed Smith-Rowland <3dw4rd@verizon.net> wrote:
> > > On 10/24/2015 11:38 PM, Jonathan Wakely wrote:
> > > > On 8 May 2015 at 15:05, Ed Smith-Rowland <3dw4rd@verizon.net> wrote:
> > > > > On 05/07/2015 12:06 PM, Jonathan Wakely wrote:
> > > > > > Hi Ed,
> > > > > >
> > > > > > The C++ committee is considering the
> > > > > > http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4437.pdf
> > > > > > proposal to make C++17 include the contents of ISO 29124:2010 (the
> > > > > > special math functions from TR1 that went into a separate standard,
> > > > > > not into C++11).
> > > > > >
> > > > > > What is the status of our TR1 implementation? Is it complete? Good
> > > > > > enough quality to move out of the tr1 sub-dir?
> > > > > >
> > > > > > Even if N4437 isn't accepted for C++17 we could move things around to
> > > > > > turn the TR1 code into an iso29124 implementation, do you think that
> > > > > > would make sense?
> > > > > That would make absolute sense.
> > > > > I actually have a tree where I've done that.
> > > > > All the functions are in there (29124 removed the hypergeometric
> > > > > functions.
> > > > > I'd like to keep those as extensions.
> > > > > I have some bugfixes also.
> > > > >
> > > > > I have a better version of the Carlson elliptic functions (which are used
> > > > > in
> > > > > the 29124 elliptic functions).
> > > > >
> > > > > Ed
> > > > Hi Ed, Florian,
> > > >
> > > > Here's a patch to re-use the TR1 math functions to implement IS 29124,
> > > > what do you think of this approach? Ed, were you just going to copy
> > > > the files and have duplicated code?
> > > >
> > > > We should probably uglify the names of the hypergeometric functions if
> > > > they are not in the final standard.
> > > >
> > > > This doesn't include Florian's patch, which should be applied.
> > > >
> > > > (I want to get this done before stage 1 ends in a couple of weeks, so
> > > > am posting this for review now, but I'll be unavailable for the next
> > > > week or two and might not be able to actually commit anything until
> > > > stage 3).
> > > Hi all!
> > >
> > > I am actually very aware of the stage 1 deadline and am working furiously!
> > >
> > > This patch adds the hypergeometric and confluent hypergeometric functions
> > > that were actually stricken fromTR29124.
> > > I actually had a mind to add those back especially since the confluent one
> > > is actually pretty stable in it's realm and is used in some statistics
> > > tests.
> > > I expect that some people have ventures to use both and so TR29129 would not
> > > be a full replacement for TR1 without them.
> > >
> > > I intend to post within the next few days.  I have to realize that some of
> > > my hopes and dreams would be better done with these in tree! ;-)
> > >
> > > Thank you for lighting a fire Jonathan!
> > Excellent, glad to hear you're on this, as you know the code and the
> > specs, whereas I'm poking around blindly :-)
> Hi Ed,
>
> Have you been able to find enough time to work on this?
>
> Will you be able to make the stage 1 deadline tomorrow, and if not, do
> you think I should apply my patch to re-use the TR1 stuff?  (We can
> apply Florian's bug fix to that as well).
I'm going to post something in a few hours.